fix(action): grep_string select_default with nil column

[jamestrew]

Description

Regression bug from #2416 where grep_string results without column numbers where not respecting the row number on select_default when using grep_string with the command :Telescope grep_string search=<CR>

Closes #2444

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list relevant details about your configuration

• Verify bug fix

• use :Telescope grep_string search=<CR> to grep for anything that's not that on the first line of the file
• select_default on some entry - the file should open on the correct line
• also verify regular :Telescop grep_string<CR> works as expected taking you to the correct row/col of the file

• Regression test for feat: utilize last window cursor position #2416

• open a buffer and move the cursor to somewhere not [1,1]
• open a new split :vnew
• :Telescope buffers and open the buffer from above -> cursor should be in the same location between the two windows
• open a new split :vnew
• :Telescope find_files and open the file from above -> cursor should be in the same location between the windows (previously would always go to [1,1])

Configuration:

• Neovim version (nvim --version): NVIM v0.9.0-dev-1290+g2257ade3d
• Operating system and version: Linux archlinux 6.1.12-arch1-1

Checklist:

• My code follows the style guidelines of this project (stylua)
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (lua annotations)

[Conni2461]

thanks :) i've rebased the branch because of duplicated docgen ^^